CN2382911Y

CN2382911Y - Flat valve for slag

Info

Publication number: CN2382911Y
Application number: CN 99224215
Authority: CN
Inventors: 冯洪志
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-06-22
Filing date: 1999-06-22
Publication date: 2000-06-14
Anticipated expiration: 2009-06-22

Abstract

The utility model relates to a flat gate valve for slag, which is closed circuit equipment special for pipelines conveying slag medium. The utility model comprises a valve body, a gate plate, and a flange externally connected, wherein, the sealing surface of the flange externally connected is provided with a boss or a bronze or steel alloy sealing ring which has high specific pressure and is used for fixing the boss; the upper part of a valve rod shaft is fixedly provided with a spacing nut; the distance between the upper end of the gate valve and a support frame is equal to the distance that the diameter dimension of a through hole of the gate valve plus the dimension of the sealing surface. The utility model effectively reduce sealing dimension under the precondition of ensuring seal effect, and causes self not to be exposed in medium whether opened or closed; medium can not erode to a sealing piece from face side. The utility model has the advantages of reasonable structure, simple process, low cost, long service life, possibility of spacing when simultaneously opened and closed by a hand, combination of the valve cover and the support frame, convenient operation, material and process saving.

Description

The lime-ash plate valve

The utility model relates to a kind of closed installation that is exclusively used in the ash-slag delivery medium pipeline, particularly a kind of dull and stereotyped lime-ash gate valve.

Present existing like product is dual from motive sealing, promptly first road is the pressurize sealing, general employing urethane rubber is the Yx type pressurize circle of material, when having pressure medium to pass through in the pipeline, the sealing lip pressurized opens, seal, for guaranteeing the effect of first road sealing, must guarantee the 1-1.5 mm clearance between flange and the flashboard, second road must be set support seal ring, the physical dimension that supports seal ring and pressurize seal ring simultaneously is subjected to the restriction of the specific pressure allowable of material, can not be too small, the size of adpting flange bolt hole center circle φ is by national Specification simultaneously, the size that must guarantee in the design, because the sealing configuration size is bigger than normal, if want both to take into account, valve its connecting bolt when mounted can not directly be connected on the valve body, external flange can only be thickeied, connecting bolt is connected on the external flange, and the socket cap screw with same size links to each other external flange with valve body outside the connecting bolt hole of external flange, external flange must strengthen again like this, and valve body also must be done corresponding increase simultaneously, and She Ji result has guaranteed sealing effect like this, but the physical dimension of external flange and valve body strengthens, and makes the installation and processing complex process; For the lime-ash medium, valve switch is not in place, and medium is very serious to the erosion of flashboard and valve body sealing surface, life of valve there is fatal influence, present similar manually-operated gate does not have limit stoper, only with range estimation control, inevitably has the valve switch incomplete phenomena; The valve gap and the support of general like product are two parts, have the loaded down with trivial details situation of waste material and processing technology.

The purpose of this utility model provides and is a kind ofly guaranteeing effectively to dwindle size of seal contact face under the prerequisite of sealing effect, simultaneously can be spacing during hand switch, the lime-ash plate valve of valve gap and support unification.

For achieving the above object, the technical solution of the utility model is: a kind of lime-ash plate valve, comprise valve body (1), flashboard (2), external flange (4), fixing high bronze of specific pressure allowable or alloyed steel seal ring (5) on the sealing surface of external flange (4) or on external flange (4) sealing surface, boss (5) is being set; The top of stem shaft (7) fixedly installs stop nut (11), and flashboard (2) upper end equals the distance that flashboard through-hole diameter size adds a size of seal contact face to the distance between support (9) lower end surface, and the gap is zero; Support (9) is valve gap and support unification type.

The utility model is owing to adopt above structure, satisfy make component such as corresponding external flange, valve body, flashboard, stem shaft under the situation of seal request again physical dimension in the optimum size scope, no matter valve is to open and close sealing surface all not expose in medium, medium does not form positive erosion to Sealing, make it rational in infrastructure, work simplification reduces cost, and has prolonged working life; Simultaneously can be spacing during hand switch, easy to use; Valve gap and support are integrated, and save material and technology.

Fig. 1 fixes the seal ring schematic representation of high specific pressure material allowable on the external flange sealing surface for the utility model.

Fig. 2 for the utility model when pressure is not high, on the available external flange sealing surface structural representation that boss replaces the seal ring of high specific pressure material allowable is set.

To be present existing like product because of size of seal contact face excessive and the valve body and the oversize blocked up schematic representation of external flange of product during the size-constrained system of external flange connecting bolt center circle for Fig. 3.

Fig. 4 is the schematic representation that valve gap of the present utility model and support unite two into one.

Fig. 5 is the plan view of overall structure schematic representation of the present utility model.

Fig. 6 is the side view of overall structure schematic representation of the present utility model.

Fig. 7 is the plan view of the profile schematic representation of flashboard of the present utility model.

Fig. 8 is the side view of the profile schematic representation of flashboard of the present utility model.

Below in conjunction with accompanying drawing embodiment of the present utility model is described further:

A kind of lime-ash plate valve, comprise valve body 1, flashboard 2, external flange 4, flashboard 2 is the flat board of band through hole, the through-hole diameter size equates with the valve inside nominal diameter, be arranged on flashboard top, valve body 1 and external flange 4 are connected by bolt, valve body 1 and support 9 fix by bolt, flashboard 2 is connected with stem shaft 7 by the T-shape groove, stem shaft 7 and support 9, handwheel 10 is connected by Stem Mut, pressurize seal ring 3 is arranged between external flange 4 and the flashboard 2, wherein 6 is user's adpting flange, for small-bore, the valve of low-pressure adopts the structure that boss 5 is set on the sealing surface of external flange 4 to replace original support seal ring, because the material of external flange is a cast iron, and therefore the specific pressure allowable of cast iron has shortened the physical dimension that supports sealing surface greater than one times of the specific pressure allowable of original support sealing ring material, makes processing technology simple again simultaneously; For the valve of big latus rectum of low-pressure or the little latus rectum of high pressure, on the sealing surface of external flange 4, fix specific pressure 4-15 allowable bronze or the original support seal ring of alloyed steel seal ring 5 replacements doubly that specific pressure allowable is higher than original support sealing ring material.

When valve reaches, stop nut 11 and locking are set on the top of axle during installation, make flashboard 2 upper ends equal the distance that flashboard through-hole diameter size adds a size of seal contact face to the distance between the support 9.In use, rotate handwheel 10, stem shaft 7 and flashboard 2 move downward, when locking nut 11 touches the upper-end surface of handwheel 10, promptly stop operating, this moment, flashboard 2 should be in full-gear, when closing valve, rotate handwheel 10 in the opposite direction, stem shaft 7 and flashboard 2 move upward, and the upper-end surface of flashboard 2 just in time is the distance that the latus rectum diameter dimension adds a size of seal contact face to the lower end surface of support 9, after flashboard 2 and stem shaft 7 these segment distances of rising, correct the lower end surface that contacts support 9 on the flashboard 2, its gap is zero, and valve just in time closed and put in place this moment.

The valve gap and the support of lime-ash plate valve are integrated, and save material and technology.

Claims

1, a kind of lime-ash plate valve, comprise valve body (1), flashboard (2), external flange (4), flashboard (2) is the flat board of band through hole, the through-hole diameter size equates with the valve inside nominal diameter, be arranged on flashboard top, valve body (1) is connected by bolt with external flange (4), valve body (1) fixes by bolt with support (9), flashboard (2) is connected with stem shaft (7) by the T-shape groove, stem shaft (7) and support (9), handwheel (10) is connected by Stem Mut, pressurize seal ring (3) is arranged between external flange (4) and the flashboard (2), it is characterized in that being provided with on the sealing surface of external flange (4) boss (5) or fixing high bronze or the alloyed steel seal ring (5) of specific pressure allowable.

2, lime-ash plate valve according to claim 1 is characterized in that the top of stem shaft (7) fixedly installs stop nut (11).

3, lime-ash plate valve according to claim 1 is characterized in that flashboard (2) upper end equals the distance that flashboard through-hole diameter size adds a size of seal contact face to the distance between the valve support (9), and the gap is zero.

4, lime-ash plate valve according to claim 1 is characterized in that valve body support (9) is valve gap and support unification type.